如何使用BitMatrix对象序列化HashMap？(二维码/ zxing)

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import com.google.zxing.common.BitMatrix;

public class SerializationExample {
    public static void main(String[] args) {
        // 创建HashMap对象并添加键值对
        HashMap<String, String> hashMap = new HashMap<>();
        hashMap.put("key1", "value1");
        hashMap.put("key2", "value2");

        try {
            // 序列化HashMap对象
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
            objectOutputStream.writeObject(hashMap);
            byte[] serializedHashMap = outputStream.toByteArray();

            // 反序列化HashMap对象
            ByteArrayInputStream inputStream = new ByteArrayInputStream(serializedHashMap);
            ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
            HashMap<String, String> deserializedHashMap = (HashMap<String, String>) objectInputStream.readObject();

            // 创建BitMatrix对象
            BitMatrix bitMatrix = new BitMatrix(deserializedHashMap.size(), deserializedHashMap.size());
            // 将HashMap中的数据填充到BitMatrix对象中
            for (String key : deserializedHashMap.keySet()) {
                int value = Integer.parseInt(deserializedHashMap.get(key));
                bitMatrix.set(Integer.parseInt(key), Integer.parseInt(key), value);
            }

            // 使用BitMatrix对象进行二维码处理或其他操作
            // ...

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}